I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
lotuses lotoses lettuces lutzes latices lattices
foetuses fetuses hiatuses lotuses meatuses coituses quietuses situses potsies stases radiuses mitises douses footsies patsies niduses fatsoes tootses lettuces sudses cutises betises lotoses touses outsees tusses mutases poetises ptoses mitoses ketoses tootsies
lotus lots loots lotas lotos louts blots clots plots slots